The moon appears to have different shapes at different times. The changes that you notice in the moon’s appearance are called phases. Sometimes the moon looks like a dish. Sometimes it looks like a slice of fruit. But you know that the moon is really shaped like a ball. Only the amount of light reflected toward the earth changes.
What happens when the sun, moon, and earth are directly in line with one another? You see the moon as either fully lighted or mostly dark. You can see a full moon only when you are on the nighttime side of the earth.
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